我是PulseAudio的新手。我正在尝试制作简单的程序。一个人会录制声音并将其保存在baniry文件中,另一个应该打开并播放。这是我的录音代码:
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <pulse/simple.h>
#include <pulse/error.h>
#define BUFSIZE 32
int main(int argc, char*argv[])
{
/* The Sample format to use */
static const pa_sample_spec ss = {
.format = PA_SAMPLE_S16LE, //16bit iqneba agwerili tito sample
.rate = 44100, //number of samples played in each second
.channels = 2
};
pa_simple *s_in = NULL;
int ret = 1;
int error;
int siri =0;
//file info
FILE* pFile;
char* yourFilePath = "xma.bin";
pFile = fopen(yourFilePath,"wb");
if (!(s_in = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, NULL, &error)))
{
fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
goto finish;
}
for (;siri<10000;siri+=1)
{
uint8_t buf[BUFSIZE];
ssize_t r;
int yorBufferSize = strlen(buf) + 1;
/* Write your buffer to disk. */
if (pa_simple_read(s_in, buf, sizeof(buf), &error) < 0)
{
fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));
goto finish;
}
if (pFile)
{
fwrite(buf, yorBufferSize, 1, pFile);
puts("Wrote to file!");
}
else
{
puts("Something wrong writing to File.");
}
}
ret = 0;
finish:
if (s_in)
pa_simple_free(s_in);
return ret;
fclose(pFile);
}
这是我的录音节目:
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <pulse/simple.h>
#include <pulse/error.h>
#define BUFSIZE 32
int main(int argc, char*argv[])
{
/* The Sample format to use */
static const pa_sample_spec ss = {
.format = PA_SAMPLE_S16LE, //16bit iqneba agwerili tito sample
.rate = 44100, //number of samples played in each second
.channels = 2
};
pa_simple *s_out = NULL;
int ret = 1;
int error;
//file info
FILE* pFile;
char* yourFilePath = "xma.bin";
pFile = fopen(yourFilePath, "rb");
/* Create a new playback stream */
if (!(s_out = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error)))
{
fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
goto finish;
}
for (;;)
{
uint8_t buf[BUFSIZE];
fread(buf, sizeof(buf), 1, pFile);
ssize_t r;
if(feof(pFile))
{
break;
}
printf("%x", buf);
/* ... and play it */
if (pa_simple_write(s_out, buf, sizeof(buf), &error) < 0)
{
fprintf(stderr, __FILE__": pa_simple_write() failed: %s\n", pa_strerror(error));
goto finish;
}
}
/* Make sure that every single sample was played */
if (pa_simple_drain(s_out, &error) < 0)
{
fprintf(stderr, __FILE__": pa_simple_drain() failed: %s\n", pa_strerror(error));
goto finish;
}
ret = 0;
finish:
if (s_out)
pa_simple_free(s_out);
return ret;
fclose(pFile);
}
对于循环记录程序只是记录某些东西的时间(无法弄清楚如何设置计时器)我知道我不应该使用gotos但它用于教育目的(在PulseAudio网站上提供的示例)。我尝试了 xma.bin 的hexdump,它给了我完全不同的输出 比 printf(“%x”,buf); 基本上printf只重复返回 bf9fe15c 并产生恼人的声音。希望你能帮忙。感谢。
答案 0 :(得分:0)
我从记录程序中删除了 pa_simple_drain()(这是我在记录程序中使用此功能的错误),现在它可以工作了。但是在 printf(&#34;%x&#34;,buf)中,它仍然会一次又一次地返回相同的十六进制值。但程序运作良好。有人可以解释为什么它会打印相同的价值吗?